How Does Biodiesel Blending Work?

Biodiesel blending procedures vary according to blending method, feedstock, and blend percentages. In all cases, blends need to be confirmed with a density check in order to ensure they meet product specifications, which require a density between 0.86 and 0.90. Typically, values fall between 0.88 and 0.90. The table below provides instructions for the four standard biodiesel blending methods: Splash blending, in-tank blending, in-line blending, and rack injection.

Splash Blending

With splash blending, Biodiesel and diesel fuel are loaded into a tank separately. Product mixing occurs as the fuel is agitated during the transportation and delivery of the Biodiesel blend to the end user. Being slightly heavier than conventional distillates, we recommend that Biodiesel be loaded second on top. This eliminates the possibility of Biodiesel settling at the bottom of the container. In the case of bottom loading, adequate fuel flow ensures no negative consequences will result from the minor viscosity differences between diesel and biodiesel.

In-Tank Biodiesel Blending

During in-tank blending, Biodiesel and petroleum diesel should be loaded separately through different incoming sources at a high enough fill rate that the fuels will mix sufficiently and require no additional agitation. Sampling is recommended to ensure that tank blends are homogeneous. If homogeneity cannot be determine through basic sampling, and density check on the sample is recommended.

In-Line Biodiesel Blending

With in-line biodiesel blending, the biodiesel is added to a stream of diesel fuel as it travels through a pipe or hose. Blending occurs as the two products move through the pipe, or once the fuel is loaded, into its receiving container.

Rack Biodiesel Blending

Rack blending is the most straightforward approach to blending bio-based fuels. It enables users to inject biodiesel directly at the rack into the tank truck, similar to current performance fuel additives and red dye.

Blending Biodiesel in Cold Weather

Cold weather preparatory recommendations are equally important when storing conventional distillates as well as biodiesel and biodiesel blends. Blended Biodiesel can be stored below ground in a majority of climates. Above ground storage—for both distillates and Targray-brand biodiesel — should be protected with insulation, agitation, kerosene blends or heating systems in areas where below freezing temperatures are common. Precautions may include protecting tank piping and pumping equipment.

Related Products & Services

Biodiesel Rail Car
EU Biofuel Distribution

Our Geneva-based European biofuels team works with commodity traders, biofuel producers, diesel distributors, retailers and transport firms to create new efficiencies across the EU’s low-carbon fuel supply chain.

Biodiesel Supply Terminal
U.S. Biodiesel Suppliers

Supported by one of the industry’s largest managed rail fleets, our United States biodiesel supply network is continuously expanding to meet jobber and retailer demand along all major transportation corridors.

+1 (514) 695-8095

Speak with a representative